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Athletic ball

  • US 4,577,865 A
  • Filed: 06/13/1984
  • Issued: 03/25/1986
  • Est. Priority Date: 06/16/1983
  • Status: Expired due to Fees
First Claim
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1. An athletic ball, comprising:

  • (a) a ball having an airtight bladder for giving impact resilience to the ball in which compressed air is charged through an air injection valve,(b) a concave housing provided within the ball on the opposite portion of the ball from the valve and contacting the surface of the bladder while maintaining the airtightness of the bladder,(c) means for detecting an external force applied to the ball and generating a signal in response thereto,(d) operation means for converting the signal from the detecting means into a numerical information signal relating to the external force applied to the ball,(e) means for displaying the numerical information obtained in the operation means, and(f) a battery power source for driving the above means, said detecting means, operation means, displaying means and battery power source being accommodated in the housing, and the sum of the weight of the housing, the detecting means, the operation means, displaying means and battery power source being substantially the same as the weight of the valve, and said weight sum being small enough such that said housing and elements disposed therein do not substantially interfere with the impact resilience of the ball.

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